Display panel and display device

A display panel and a display device are disclosed. The display panel includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first base, a thin film transistor layer, and a plurality of pixel electrodes. The thin film transistor layer includes an insulating layer and a plurality of data lines. The data lines are divided into a plurality of first subsections corresponding to the pixel electrodes. A sum of thicknesses of the insulating layer and the first base corresponding to positions of the first subsections is less than a sum of thicknesses of the insulating layer and the first base corresponding to positions of the pixel electrodes.